Dayangchem's R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. DayangChem can provide different quantities
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inquiryethyl 2-oxo-2-(2-oxocyclohexyl)acetate
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
Conditions | Yield |
---|---|
With hydrazine hydrate; acetic acid at 0℃; Reflux; | 98% |
With acetic acid; hydrazine for 1h; Reflux; | 86% |
With acetic acid; hydrazine for 1h; Reflux; | 86% |
2-(trimethylsilyl)cyclohexen-1-yl triflate
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
Conditions | Yield |
---|---|
With cesium fluoride In tetrahydrofuran at 60℃; for 24h; Inert atmosphere; | 98% |
diazoacetic acid ethyl ester
cyclohexanone
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
Conditions | Yield |
---|---|
With pyrrolidine In dimethyl sulfoxide at 20℃; for 12h; Solvent; Reagent/catalyst; regioselective reaction; | 87% |
With pyrrolidine at 80℃; | 21% |
ethyl 2-(cyclohex-1-en-1-yl)-2-diazoacetate
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
Conditions | Yield |
---|---|
In octane at 110℃; for 1h; | 65% |
In octane at 110℃; for 1h; | 59% |
cyclohexanone (ethoxycarbonyl)hydrazone
oxalic acid diethyl ester
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
Conditions | Yield |
---|---|
Stage #1: cyclohexanone (ethoxycarbonyl)hydrazone With n-butyllithium In tetrahydrofuran; hexane at -78 - 20℃; for 1.16667h; Stage #2: oxalic acid diethyl ester In tetrahydrofuran; hexane at -78 - 20℃; for 16h; Stage #3: With sulfuric acid In toluene for 8h; Heating; Further stages.; | 43% |
Stage #1: cyclohexanone (ethoxycarbonyl)hydrazone With n-butyllithium In tetrahydrofuran; hexane at -78 - 20℃; for 1h; Stage #2: oxalic acid diethyl ester In tetrahydrofuran; hexane at -78 - 20℃; for 16h; Stage #3: With toluene-4-sulfonic acid In toluene for 8h; Heating; Further stages.; | 43% |
diazoacetic acid ethyl ester
1-(1-Cyclohexen-1-yl)pyrrolidine
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
Conditions | Yield |
---|---|
With chloroform |
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: EtONa / ethanol / 18 h / 20 °C 2: N2H4*H2O; AcOH / 8 h / Heating View Scheme |
1-hydroxy-1-ethoxycarbonyl-diazomethylcyclohexane
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 84 percent / phosphoryl chloride, pyridine / 6.5 h / 0 °C 2: 59 percent / octane / 1 h / 110 °C View Scheme | |
Multi-step reaction with 2 steps 1: 80 percent / POCl3, pyridine / 1) 0 deg C, 6 h, 2) r.t., 12 h 2: 65 percent / octane / 1 h / 110 °C View Scheme | |
Stage #1: 1-hydroxy-1-ethoxycarbonyl-diazomethylcyclohexane With pyridine; trichlorophosphate at 20℃; Stage #2: In octane at 110℃; |
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: 88 percent / lithium diisopropylamide / hexane; tetrahydrofuran / 2 h / -78 °C 2: 84 percent / phosphoryl chloride, pyridine / 6.5 h / 0 °C 3: 59 percent / octane / 1 h / 110 °C View Scheme |
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: 1) n-BuLi / 1) ether, THF, -110 deg C, 2) -110 to -25 deg C 2: 80 percent / POCl3, pyridine / 1) 0 deg C, 6 h, 2) r.t., 12 h 3: 65 percent / octane / 1 h / 110 °C View Scheme | |
Multi-step reaction with 2 steps 1: sodium ethanolate / ethanol / 7 h / 0 - 20 °C 2: hydrazine hydrate; acetic acid / 0 °C / Reflux View Scheme | |
Multi-step reaction with 2 steps 1: sodium ethanolate / ethanol / 12 h / 20 °C 2: hydrazine; acetic acid / 1 h / Reflux View Scheme | |
Multi-step reaction with 2 steps 1.1: diisopropylamine; n-butyllithium / tetrahydrofuran; hexane / 1 h / -78 °C 2.1: pyridine; trichlorophosphate / 20 °C 2.2: 110 °C View Scheme | |
Multi-step reaction with 2 steps 1: sodium / ethanol / 12 h / 0 - 20 °C 2: acetic acid; hydrazine / 1 h / Reflux View Scheme |
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carbohydrazide
Conditions | Yield |
---|---|
With hydrazine hydrate In ethanol for 36h; Reflux; | 100% |
With hydrazine In ethanol for 24h; Reflux; | 64% |
With hydrazine In ethanol for 24h; Reflux; | 64% |
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
(4,5,6,7-tetrahydro-1H-indazol-3-yl)methanol
Conditions | Yield |
---|---|
With lithium aluminium tetrahydride In tetrahydrofuran at 0 - 20℃; | 88% |
With tetrahydrofuran; lithium aluminium tetrahydride |
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
4,5,6,7-tetrahydro-1H-indazole-3-carboxylic acid
Conditions | Yield |
---|---|
With sodium hydroxide In 1,4-dioxane at 20℃; for 18h; | 53% |
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
ethyl 1H-indazole-3-carboxylate
Conditions | Yield |
---|---|
With palladium on activated charcoal; decalin |
benzyl bromide
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
1-benzyl-4,5,6,7-tetrahydro-1H-indazole-3-carboxylic acid ethyl ester
Conditions | Yield |
---|---|
With potassium carbonate In N,N-dimethyl-formamide at 60℃; for 16h; | 1.05 g |
ethanol
benzyl bromide
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
Conditions | Yield |
---|---|
Verseifen mit alkoh.Natronlauge; |
Conditions | Yield |
---|---|
Verseifen mit alkoh.Natronlauge; |
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
1-Benzyl-3-hydroxymethyl-4,5,6,7-tetrahydro-1H-indazole
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 1.05 g / K2CO3 / dimethylformamide / 16 h / 60 °C 2: 740 mg / LiAlH4 / tetrahydrofuran / 1.5 h / 20 - 50 °C View Scheme |
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
1-Benzyl-3-bromomethyl-4,5,6,7-tetrahydro-1H-indazole
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: 1.05 g / K2CO3 / dimethylformamide / 16 h / 60 °C 2: 740 mg / LiAlH4 / tetrahydrofuran / 1.5 h / 20 - 50 °C 3: 39 percent / PPh3, Br2 / CCl4 / 1.5 h / Ambient temperature View Scheme |
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 5 steps 1: 1.05 g / K2CO3 / dimethylformamide / 16 h / 60 °C 2: 740 mg / LiAlH4 / tetrahydrofuran / 1.5 h / 20 - 50 °C 3: 39 percent / PPh3, Br2 / CCl4 / 1.5 h / Ambient temperature 4: 1.) NaN(TMS)2 / 1.) THF, DMF, 0 deg C, 5 min, 2.) THF, DMF, RT, 3 h 5: 105 mg / formic acid / 10percent Pd/C / ethanol / 3 h / Heating View Scheme |
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
2-[2,4-Dioxo-5-phenyl-3-(4,5,6,7-tetrahydro-1-benzyl-1H-indazol-3-ylmethyl)-2,3,4,5-tetrahydro-benzo[b][1,4]diazepin-1-yl]-N-isopropyl-N-(4-methoxyphenyl)-acetamide
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: 1.05 g / K2CO3 / dimethylformamide / 16 h / 60 °C 2: 740 mg / LiAlH4 / tetrahydrofuran / 1.5 h / 20 - 50 °C 3: 39 percent / PPh3, Br2 / CCl4 / 1.5 h / Ambient temperature 4: 1.) NaN(TMS)2 / 1.) THF, DMF, 0 deg C, 5 min, 2.) THF, DMF, RT, 3 h View Scheme |
4-methylisopropylbenzene
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
ethyl 1H-indazole-3-carboxylate
Conditions | Yield |
---|---|
palladium | |
palladium |
benzyl bromide
potassium carbonate
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
1-benzyl-4,5,6,7-tetrahydro-1H-indazole-3-carboxylic acid ethyl ester
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide |
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
N'-[(2-hydroxynaphthalen-1-yl)methylene]-4,5,6,7-tetrahydro-1H-indazole-3-carbohydrazone
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: hydrazine hydrate / ethanol / 36 h / Reflux 2: acetic acid / ethanol / 6 h / Reflux View Scheme |
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
N'-[(2-hydroxyphenyl)methylene]-4,5,6,7-tetrahydro-1H-indazole-3-carbohydrazone
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: hydrazine hydrate / ethanol / 36 h / Reflux 2: acetic acid / ethanol / 6 h / Reflux View Scheme | |
Multi-step reaction with 2 steps 1: hydrazine / ethanol / 24 h / Reflux 2: ethanol / Reflux View Scheme |
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
N'-[(4-cyanophenyl)methylene]-4,5,6,7-tetrahydro-1H-indazole-3-carbohydrazone
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: hydrazine hydrate / ethanol / 36 h / Reflux 2: acetic acid / ethanol / 6 h / Reflux View Scheme |
ethyl 4,5,6,7-tetrahydro-1H-indazole-3-carboxylate
N'-[(4-chloro-3-fluorophenyl)methylene]-4,5,6,7-tetrahydro-1H-indazole-3-carbohydrazone
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: hydrazine hydrate / ethanol / 36 h / Reflux 2: acetic acid / ethanol / 6 h / Reflux View Scheme |
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